docs: add doc strings and README info

README.md

@@ -29,3 +29,13 @@ Current contribution workflow is:
 2. Use `cz c` to add a commit
 3. Push changes
 4. Open pull/merge request
+
+## Maintainance
+
+**Versioning:**
+TODO; explain versioning
+
+**Check for unused dependencies:**
+```sh
+cargo +nightly udeps --all-targets
+```